三峡库区汉丰湖水华期水体富营养化研究  

Study on Water Eutrophication during Algal Bloom Period in Hanfeng Lake of the Three Gorges Reservoir Area

作　　者：刘志超[1] 迟明慧 LIU Zhichao;CHI Minghui(Institute of Water Ecology and Environment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]中国环境科学研究院水生态环境研究所,北京100012

出　　处：《防化研究》2024年第2期68-72,共5页CBRN DEFENSE

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07206-001-03)。

摘　　要：汉丰湖是三峡库区的“库中库”,同时也是我国西部地区最大的城市人工湖,近年来时有水华暴发。通过在汉丰湖流域蓝藻水华暴发期选择10个采样点进行水环境质量监测,结合对该地区的实地调研情况,分析了该区域水污染的主要成因。结果表明,研究区的总磷、氨氮、总氮、化学需氧量、五日生化需氧量、高锰酸盐指数等各污染物指标均较高,且时空分布差异较大,南河汇入区水质明显劣于其他区域。根据富营养化评价结果,研究区的富营养化指数自西向东逐渐下降,氮、磷是导致水体出现富营养化的重要因素。Hanfeng Lake,a distinctive“reservoir within a reservoir”in the Three Gorges Reservoir area,is the largest artificial urban lake in western China.However,it has experienced periodic algal blooms in recent years.In this paper,focusing on Hanfeng Lake watershed,water quality monitoring was conducted by selecting 10 sampling points during algal bloom periods and made field investigations in this area.Based on these findings,the primary causes of water pollution were analyzed,and the corresponding prevention and control strategies were proposed.The results revealed high concentrations of pollutants such as total phosphorus,NH3-N,total nitrogen,chemical oxygen demand,biochemical oxygen demand after 5 days and permanganate index in the study area and exhibited a wide variation in spatial and temporal distribution.Notably,the water quality in the Nanhe River confluence area was significantly poorer than that in other regions.The eutrophication assessment indicated a gradual decrease in eutrophication index from west to east,with nitrogen and phosphorus being the primary factors affecting water eutrophication.

关 键 词：三峡库区 汉丰湖 水华 富营养化指数 氮磷比 

分 类 号：X5[环境科学与工程—环境工程]